12020211971 has 2 divisors, whose sum is σ = 12020211972. Its totient is φ = 12020211970.

The previous prime is 12020211949. The next prime is 12020211979. The reversal of 12020211971 is 17911202021.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12020211971 - 2²² = 12016017667 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12020211971.

It is not a weakly prime, because it can be changed into another prime (12020211979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6010105985 + 6010105986.

It is an arithmetic number, because the mean of its divisors is an integer number (6010105986).

Almost surely, 2^12020211971 is an apocalyptic number.

12020211971 is a deficient number, since it is larger than the sum of its proper divisors (1).

12020211971 is an equidigital number, since it uses as much as digits as its factorization.

12020211971 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 504, while the sum is 26.

Adding to 12020211971 its reverse (17911202021), we get a palindrome (29931413992).

The spelling of 12020211971 in words is "twelve billion, twenty million, two hundred eleven thousand, nine hundred seventy-one".